CN215845052U

CN215845052U - Bending transmission mechanism of pipe bending machine and pipe bending machine

Info

Publication number: CN215845052U
Application number: CN202121028525.8U
Authority: CN
Inventors: 屠建国; 熊国光; 屠亮; 屠小波
Original assignee: Sichuan Jingfeng Machinery Co ltd
Current assignee: Sichuan Jingfeng Machinery Co ltd
Priority date: 2021-05-13
Filing date: 2021-05-13
Publication date: 2022-02-18
Anticipated expiration: 2031-05-13

Abstract

The utility model provides a bending transmission mechanism of a pipe bender, which comprises: the driving gear is in transmission connection with the first driving piece; a sun gear disposed on the fixed shaft and engaged with the driving gear; planetary gear assembly, two planetary gear assembly symmetries set up in the fixed axle both sides, wherein: the planetary gear assembly at least comprises a revolution mounting sleeve which can rotate around a fixed shaft under the drive of a second driving piece, a lower rotating shaft is coaxially and rotatably mounted in the revolution mounting sleeve, a planetary gear is arranged at one end of the lower rotating shaft, a lower die is arranged at the other end of the lower rotating shaft, and the planetary gear is in transmission connection with a sun gear; and the driven gear is fixed at one end of the upper rotating shaft, the other end of the upper rotating shaft is provided with an upper die, and the driven gear is meshed with the driving gear. The traction speed ratio between the upper die and the lower die is consistent, and the pipe with different bending degree requirements can be processed. Still provide a bending machine, compare in traditional bending machine processingquality is higher.

Description

Bending transmission mechanism of pipe bending machine and pipe bending machine

Technical Field

The utility model relates to the technical field of section bar processing equipment, in particular to a transmission mechanism of a pipe bender and the pipe bender.

Background

The pipe bender can be roughly divided into a numerical control pipe bender, a hydraulic pipe bender and the like, is mainly used for laying and repairing pipelines in the aspects of electric power construction, highway and railway construction, boilers, bridges, ships, furniture, decoration and the like, has the advantages of multiple functions, reasonable structure, simplicity in operation and the like, and is mainly used for plastic forming of pipes.

In an actual use scene, the bending degree of the pipe is not unique, and how to realize the processing of the pipes with different bending degrees on the same pipe bender is one of the points concerned by people; in addition, most of the conventional pipe bending machines are three rollers which are arranged in a triangular mode and rotate on parallel shafts, one of the rollers can move relative to the other two rollers to bend pipes on the other two rollers, and the traction speed ratio of the three rollers is ensured to be consistent in production, so that the quality of the bent pipes is ensured to be another technical difficulty in production. In summary, the conventional bending machine has at least the following two problems in production:

1. the pipe is difficult to be processed with different bending degrees on the same pipe bender;

2. it is difficult to ensure that the three rollers have the same traction speed ratio.

In view of this, the present application is specifically made.

SUMMERY OF THE UTILITY MODEL

In view of the deficiencies of the prior art, a first object of the present invention is to provide a bending transmission mechanism of a pipe bender, which has a consistent traction speed ratio between upper and lower dies and can process pipes with different bending degree requirements.

Another objective of the present invention is to provide a pipe bender, which has a reasonable structure and a strong practicability, and has a higher processing quality compared to the conventional pipe bender.

The embodiment of the utility model is realized by the following technical scheme:

a bending transmission mechanism of a pipe bender comprises: the driving gear is in transmission connection with the first driving piece; a sun gear disposed on the fixed shaft and engaged with the driving gear; planetary gear assembly, two planetary gear assembly symmetry sets up in the fixed axle both sides, wherein: the planetary gear assembly at least comprises a revolution mounting sleeve which can rotate around the fixed shaft under the drive of a second driving piece, a lower rotating shaft is coaxially and rotatably mounted in the revolution mounting sleeve, a planetary gear is arranged at one end of the lower rotating shaft, a lower die is arranged at the other end of the lower rotating shaft, and the planetary gear is in transmission connection with the sun gear; the driven gear is fixed at one end of an upper rotating shaft, an upper die is arranged at the other end of the upper rotating shaft, and the driven gear is meshed with the driving gear; the lower rotating shaft, the upper rotating shaft and the fixed shaft are arranged in parallel with each other.

According to a preferred embodiment, the fixed shaft comprises a swivel part and a male part, which are coaxially and rotatably connected, wherein: one end of the self-rotating part is nested at one end of the common rotating part and is rotationally connected with the common rotating part through a first bearing, a transition gear and the sun gear are coaxially mounted on the self-rotating part, the sun gear is meshed with the driving gear, and the transition gear is meshed with the planet gear; and a planet carrier plate is arranged on the outer wall of the revolution mounting sleeve and is rotationally connected with the revolution part.

According to a preferred embodiment, the number of the planet carrier plates is at least one, and the planet carrier plates on the revolution mounting sleeves of the two planet gear assemblies are staggered along the axial direction of the revolution part.

According to a preferred embodiment, the number of the planet carrier plates is multiple, and the planet carrier plates on the revolution mounting sleeves of the two planet gear assemblies are staggered along the axial direction of the revolution part.

According to a preferred embodiment, the male rotating portion is cylindrical, an oil storage chamber extending in the axial direction is arranged in the male rotating portion, and lubricating oil holes corresponding to the planet carrier plates one to one are arranged in the side wall of the male rotating portion and communicated with the oil storage chamber.

According to a preferred embodiment, the first driving member is an electric motor or a hydraulic motor, the output end of the first driving member is in transmission connection with a speed reducer, and the driving gear is mounted at the output end of the speed reducer.

According to a preferred embodiment, the second driving member is one of a pneumatic cylinder, a hydraulic cylinder and an electric rod.

According to a preferred embodiment, the upper mold is fixedly connected to the upper rotating shaft, and the lower mold is fixedly connected to the lower rotating shaft.

A pipe bending machine comprises a box body and the bending transmission mechanism, wherein the bending transmission mechanism is installed on the box body.

According to a preferred embodiment, a partition board is arranged in the box body and divides the box body into a first installation cavity and a second installation cavity, wherein: the driving gear, the sun gear, the planet gear and the driven gear are distributed in the first mounting cavity; the partition plate and the side wall of the box body close to the second mounting cavity are provided with rotating grooves for nesting the revolution mounting sleeve in a penetrating manner; the upper rotating shaft and the fixed shaft penetrate through the partition plate and the side wall of the second installation cavity, and the upper rotating shaft is rotatably connected with the partition plate and the side wall of the second installation cavity, which is close to the box body.

The technical scheme of the embodiment of the utility model at least has the following advantages and beneficial effects:

(1) the transmission structure composed of the sun gear, the fixed shaft, the planetary gear, the lower rotating shaft and the second driving piece is similar to the planetary gear transmission structure in the overall motion form, the angular speed adjustment of the upper die and the lower die is realized through the linkage among the driving gear, the driven gear, the sun gear and the planetary gear, the upper die and the lower die can achieve the same traction speed ratio when the pipe is bent, the processing quality of the pipe is higher, meanwhile, the sun gear and the planetary gear always keep the transmission connection relation in the process that the lower die is jacked by the second driving piece to be close to the upper die, so that the bending degree of the pipe to be processed can be accurately mastered through the jacking height of the second driving piece, the processing precision of the device can be effectively improved, the processing of different bending degrees of the pipe can be realized through controlling the jacking height of the second driving piece, the practicability is strong.

(2) The sun gear and the planet gear are in a transmission connection state all the time, so that if a certain part in the planet gear assembly is loosened in the jacking process of the second driving piece, namely the part deviates from a set motion track in the jacking process of the second driving piece, the transmission connection relation between the sun gear and the planet gear is damaged at the moment, the effect of reminding workers can be achieved in the production process, once the transmission connection between the sun gear and the planet gear is found to be invalid, the workers should overhaul the equipment immediately, the equipment is maintained to operate stably, and the purpose of reducing the defective rate of products is achieved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic perspective view of a bending mechanism of a pipe bender according to embodiment 1 of the present invention;

FIG. 2 is a schematic view of the mounting structure of the fixing shaft according to the present invention;

fig. 3 is a schematic front view of a pipe bender according to embodiment 2 of the present invention;

fig. 4 is a left side partial sectional structural schematic view of a pipe bender according to embodiment 2 of the present invention;

fig. 5 is a schematic top view of a pipe bender according to embodiment 2 of the present invention;

fig. 6 is a schematic perspective view of a pipe bender according to embodiment 2 of the present invention.

Icon: 1-box body, 21-driving gear, 22-sun gear, 23-transition gear, 24-fixed shaft, 241-revolution part, 2411-oil storage cavity, 2412-lubricating oil hole, 242-revolution part, 25-planetary gear assembly, 251-revolution mounting sleeve, 252-lower rotating shaft, 253-planetary gear, 254-second driving piece, 255-planetary frame plate, 256-lower die, 26-driven gear, 27-upper rotating shaft, 28-upper die, 3-partition plate, 4-inner mounting frame, 5-outer mounting frame, 6-first bearing, 7-second bearing, 8-rotating groove, 9-speed reducer, 10-first driving piece, 11-pump station, 12-belt, 13-fourth bearing, 14-through hole, I-first installation cavity and II-second installation cavity.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that, if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings or the orientation or positional relationship which is usually placed when the products of the present invention are used, it is only for convenience of describing the present invention and simplifying the description, but it is not intended to indicate or imply that the device or element which is referred to must have a specific orientation, be constructed in a specific orientation and be operated, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it should be further noted that unless otherwise explicitly stated or limited, the terms "disposed," "mounted," "connected," and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example 1

Referring to fig. 1 to 5, a bending transmission mechanism of a pipe bender includes: and the driving gear 21 is in transmission connection with the first driving piece 10. In this embodiment, the first driving member 10 is an electric motor or a hydraulic motor, the output end of the first driving member is connected to the speed reducer 9 in a transmission manner, and the driving gear 21 is mounted at the output end of the speed reducer 9. As shown in fig. 5, preferably, the first driving member 10 is a motor, and the speed reducer 9 is a cycloidal gear speed reducer, where the first driving member 10 is in transmission connection with the speed reducer 9 through a belt 12, so as to provide power for a driving gear 21 installed at the output end of the speed reducer 9. As shown in fig. 1, a sun gear 22 is further included, which is disposed on the fixed shaft 24 and is engaged with the driving gear 21. Planetary gear assembly 25, two planetary gear assembly 25 symmetry set up in fixed axle 24 both sides, wherein: the planetary gear assembly 25 at least includes an orbiting mounting sleeve 251 driven by the second driving member 254 to rotate around the fixed shaft 24, and a lower rotating shaft 252 coaxially and rotatably mounted in the orbiting mounting sleeve 251 through a third bearing. In this embodiment, the third bearing may be a deep groove ball bearing. A planetary gear 253 is arranged at one end of the lower rotary shaft 252, a lower die 256 is arranged at the other end of the lower rotary shaft 252, and the planetary gear 253 is in transmission connection with the sun gear 22. And a driven gear 26 fixed to one end of an upper rotating shaft 27, an upper mold 28 being disposed at the other end of the upper rotating shaft 27, and the driven gear 26 being engaged with the drive gear 21. The lower rotating shaft 252, the upper rotating shaft 27 and the fixed shaft 24 are disposed parallel to each other. In this embodiment, the second driving member 254 is one of an air cylinder, a hydraulic cylinder, and an electric rod. Preferably, the second drive 254 is a hydraulic cylinder.

Specifically, as shown in fig. 1, in the same manner as the arrangement of the conventional bender, the upper rotary shaft 27 and the two planetary gear assemblies 25, i.e., the upper rotary shaft 27 and the two lower rotary shafts 252, in the present embodiment are disposed in a triangular form, and the lower rotary shaft 252, the upper rotary shaft 27 and the fixed shaft 24 are disposed in parallel with each other. In use, the driving gear 21 is driven by the first driving member 10 to rotate the sun gear 22 around the central axis of the fixed shaft 24, and the driving gear 21 also drives the driven gear 26 around the central axis of the upper rotating shaft 27. The sun gear 22 drives the planetary gear 253 in transmission connection therewith to rotate about the central axis of the lower rotating shaft 252. In an actual use scene, a worker can adjust the transmission ratio among the gears according to the processing requirement, so that the rotating angular speeds of the upper rotating shaft 27 and the lower rotating shaft 252 can be adjusted, the traction speed ratio between the upper die 28 mounted on the upper rotating shaft 27 and the lower die 256 mounted on the lower rotating shaft 252 can be consistent, rolling friction is kept between the pipe and the upper die 28 and the lower die 256 in the bending and advancing process all the time, the surface of the pipe is prevented from being abraded, and the processing quality of the pipe is guaranteed. In use, the angular velocities of the upper die 28 and the lower die 256 are adjusted for the degree of bending of the particular pipe to be processed to achieve the same draw ratio for the degree of bending of the pipe. Then the pipe to be processed is placed on the two lower dies 256, at this time, the second driving member 254 is started, the second driving member 254 lifts up and drives the revolution mounting sleeve 251, that is, the lower rotating shaft 252 and the lower die 256 are driven to approach the upper die 28 in a manner of rotating around the central axis of the fixed shaft 24, so as to bend and extrude the pipe to be processed, when the lower die 256 reaches a corresponding height, the second driving member 254 stops lifting up, and finally, the first driving member 10 is started to enable the bending transmission mechanism of the pipe bender to operate, so that the bending processing of the pipe to be processed is completed.

In this embodiment, a transmission structure formed by the sun gear 22, the fixed shaft 24, the planetary gear 253, the lower rotating shaft 252 and the second driving member 254 is similar to a transmission structure of the planetary gear 253 in the overall movement form, and the angular velocity adjustment of each of the upper mold 28 and the lower mold 256 is realized through the linkage among the driving gear 21, the driven gear 26, the sun gear 22 and the planetary gear 253, so that the upper mold 256 and the lower mold 256 can achieve the same traction speed ratio when the pipe is bent, and the pipe can be processed with higher quality. It should be noted that, in use, the lifting height of the second driving member 254 can be controlled by a travel switch. The pipe is processed in different bending degrees by controlling the jacking height of the second driving piece 254, so that the pipe bending machine is high in practicability.

In this embodiment, further, since the sun gear 22 and the planet gears 253 are always in the transmission connection state, if a part of the planet gear assembly 25 becomes loose in the jacking process of the second driving member 254, that is, the part deviates from a predetermined motion trajectory in the jacking process of the second driving member 254, the transmission connection relationship between the sun gear 22 and the planet gears 253 is broken, so that an effect of reminding a worker in the production process can be achieved, once the transmission connection between the sun gear 22 and the planet gears 253 is found to be failed, the worker should immediately overhaul the equipment, so that the operation stability of the equipment is maintained, and the purpose of reducing the defective rate of products is achieved.

As shown in fig. 2, in the present embodiment, the fixed shaft 24 includes a rotation part 242 and a revolution part 241 which are coaxially and rotatably connected, wherein: one end of the rotation part 242 is nested at one end of the revolution part 241 and is rotatably connected with the rotation part through a first bearing 6, a transition gear 23 and a sun gear 22 are coaxially installed on the rotation part 242, the sun gear 22 is meshed with the driving gear 21, and the transition gear 23 is meshed with the planet gear 253. A carrier plate 255 is disposed on an outer wall of the revolving mounting sleeve 251, and the carrier plate 255 is rotatably connected to the revolving portion 241 by a second bearing 7. Preferably, the transition gear 23 and the sun gear 22 are detachably connected to the rotation part 242 by a key, so that they can be easily replaced. Preferably, the first bearing 6 is a needle bearing NA6904, and the second bearing 7 is an oil bearing. Further, as shown in fig. 2, the revolving part 241 and the rotating part 242 are both cylindrical, an oil reservoir chamber 2411 extending in the axial direction is disposed inside the revolving part 241, oil holes 2412 corresponding to the carrier plates 255 one by one are disposed on the side wall of the revolving part 241, and the oil holes 2412 communicate with the oil reservoir chamber 2411. In use, the oil storage chamber 2411 is filled with lubricating oil, and the lubricating oil lubricates the second bearing 7 through the lubricating oil hole 2412.

As shown in fig. 1 and 2, the number of the carrier plates 255 is at least one, and the carrier plates 255 on the revolving mounting sleeve 251 of each of the two planetary gear assemblies 25 are staggered in the revolving portion 241 along the axial direction thereof. Further, in order to improve stability, the number of the carrier plates 255 is plural, and the carrier plates 255 on the revolving mounting sleeve 251 of each of the two planetary gear assemblies 25 are staggered along the axial direction thereof at the revolving portion 241. In this embodiment, the number of the crank plates is 3, the outer shape of the crank plates is in the shape of a circular arc plate which is bent downwards, and the structure enables the planet carrier plate 255 to have high rigidity and good stability in the jacking process of the second driving member 254.

As shown in fig. 4, the upper mold 28 is fixedly connected to the upper rotating shaft 27 by a key, and the lower mold 256 is fixedly connected to the lower rotating shaft 252 by a key. When in use, the corresponding upper die 28 and the lower die 256 can be replaced according to the processing requirement, and the practicability is strong.

Example 2

Referring to fig. 1 to 6, a pipe bender includes a box 1 and the bending transmission mechanism, and the bending transmission mechanism is mounted on the box 1. As shown in fig. 4, a partition plate 3 which separates the box body into a first installation cavity i and a second installation cavity ii is arranged in the box body 1, wherein: the driving gear 21, the sun gear 22, the planet gears 253 and the driven gears 26 are all distributed in the first installation cavity I. The partition plate 3 and the side wall of the box body 1 close to the second mounting cavity II are provided with a rotating groove 8 for nesting the revolution mounting sleeve 251 in a penetrating manner. As shown in fig. 3, the rotation groove 8 has an arc shape. The upper rotating shaft 27 and the fixed shaft 24 both penetrate through the partition plate 3 and the side wall of the box body 1 close to the second mounting cavity II, and the upper rotating shaft 27 is rotatably connected with the partition plate 3 and the side wall of the box body 1 close to the second mounting cavity II through the fourth bearing 13. In this embodiment, in order to install the speed reducer 9, the inner mounting frame 4 is installed on one side of the partition plate 3 close to the first mounting cavity i through a bolt, a through hole 14 is formed in the inner mounting frame 4 in a penetrating manner, the speed reducer 9 is installed on one side of the inner mounting frame 4 far away from the partition plate 3, and an output shaft of the speed reducer penetrates through the through hole 14 and is connected to the driving gear 21. As shown in fig. 2, one end of the rotation part 242 is rotatably connected to the inner mount 4 through the first bearing 6, and the other end thereof is nested in one end of the revolution part 241 and rotatably connected thereto through the first bearing 6. At this time, both ends of the rotation portion 242 are supported by the supporting force, so that the rotation portion can rotate stably. The revolving part 241 is tightly fitted with the partition 3, the sidewall of the casing 1, and the outer mount 5, respectively, so that it can better support the planet carrier 255 and the revolving part 242.

In this embodiment, the upper rotating shaft 27 and the lower rotating shaft 252 both extend out of the box body 1, so as to facilitate the installation and replacement of the corresponding upper mold 28 and lower mold 256. In this embodiment, the second driving member 254 is hinged to the case 1, and the second driving member 254 is hinged to the revolving mounting sleeve 251.

In this embodiment, the first driving member 10 is installed in the first installation cavity i, and a pump station 11 for supplying power to the second driving member 254 is also installed in the first installation cavity i.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a bending transmission mechanism of pipe bender which characterized in that includes:

the driving gear (21) is in transmission connection with the first driving piece (10);

a sun gear (22) provided on a fixed shaft (24) and engaged with the drive gear (21);

planetary gear assembly (25), two planetary gear assembly (25) symmetry set up in fixed axle (24) both sides, wherein: the planetary gear assembly (25) at least comprises a revolution mounting sleeve (251) which can rotate around the fixed shaft (24) under the drive of a second driving piece (254), a lower rotating shaft (252) is coaxially and rotatably mounted in the revolution mounting sleeve (251), a planetary gear (253) is arranged at one end of the lower rotating shaft (252), a lower die (256) is arranged at the other end of the lower rotating shaft (252), and the planetary gear (253) is in transmission connection with the sun gear (22);

a driven gear (26) fixed to one end of an upper rotating shaft (27), an upper die (28) being disposed on the other end of the upper rotating shaft (27), the driven gear (26) being engaged with the drive gear (21);

the lower rotating shaft (252), the upper rotating shaft (27) and the fixed shaft (24) are arranged in parallel with each other.

2. The bending transmission mechanism of a pipe bender according to claim 1, wherein said fixed shaft (24) comprises a rotation part (242) and a revolution part (241) which are coaxially and rotatably connected, wherein:

one end of the rotating part (242) is nested at one end of the rotating part (241) and is in rotating connection with the rotating part through a first bearing (6), a transition gear (23) and the sun gear (22) are coaxially mounted on the rotating part (242), the sun gear (22) is meshed with the driving gear (21), and the transition gear (23) is meshed with the planetary gear (253);

a planet carrier plate (255) is arranged on the outer wall of the revolution mounting sleeve (251), and the planet carrier plate (255) is rotatably connected with the revolution part (241).

3. The bending actuator of a bending machine according to claim 2, wherein the number of the planetary carrier plates (255) is at least one, and the planetary carrier plates (255) on the revolving mounting sleeves (251) of the two planetary gear assemblies (25) are staggered in the axial direction of the revolving portion (241).

4. The bending actuator of a bending machine according to claim 3, wherein the number of the planetary carrier plates (255) is plural, and the planetary carrier plates (255) on the revolving mounting sleeve (251) of each of the two planetary gear assemblies (25) are staggered in the axial direction of the revolving portion (241).

5. The bending transmission mechanism of a pipe bender according to claim 4, wherein the male portion (241) is cylindrical, an oil storage chamber (2411) extending along the axial direction is arranged in the male portion, the side wall of the male portion (241) is provided with lubricating oil holes (2412) corresponding to the planet carrier plates (255) in a one-to-one manner, and the lubricating oil holes (2412) are communicated with the oil storage chamber (2411).

6. The bending transmission mechanism of a pipe bender according to claim 1, wherein the first driving member (10) is an electric motor or a hydraulic motor, the output end of the first driving member is in transmission connection with a speed reducer (9), and the driving gear (21) is mounted at the output end of the speed reducer (9).

7. The bending actuator of the bender according to claim 1, wherein said second driving member (254) is one of an air cylinder, a hydraulic cylinder, and an electric rod.

8. The bending actuator of a bending machine according to claim 1, wherein the upper mold (28) is fixedly connected to the upper shaft (27), and the lower mold (256) is fixedly connected to the lower shaft (252).

9. A bending machine comprising a housing (1), a bending actuator according to any of claims 1-8 mounted on the housing (1).

10. The bending machine according to claim 9, wherein a partition (3) is provided in the housing (1) to divide the housing into a first mounting chamber (i) and a second mounting chamber (ii), wherein:

the driving gear (21), the sun gear (22), the planet gear (253) and the driven gear (26) are all distributed in the first mounting cavity (I);

the partition plate (3) and the side wall of the box body (1) close to the second mounting cavity (II) are provided with a rotating groove (8) for nesting the revolution mounting sleeve (251) in a penetrating manner;

go up pivot (27) with fixed axle (24) all run through baffle (3) and box (1) are close to the lateral wall of second installation cavity (II), and go up pivot (27) with baffle (3) and box (1) are close to the lateral wall of second installation cavity (II) rotates and is connected.